ok i re wired my fans last year before i started coming to this site so anyways i know now that u can buy different cooling fan sensors to turn on when u want them on but what i did was rewire the fans into a switch and my switch in the dash keeps getting really hot so put a fuse in between the switch and the fuse box where i have my power wire going to.. someone told me i could put a resister or a relay on to the wire so that it wouldnt blow the fuse or all the power wouldnt go right to the switch does ny one have a part number for a resister or a relay that would work? and if any one can tell me how to wire it in that would be great thanks for all the help!!

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1988 firebird ws6 formula350tpi ascd ram air hood GT AUTO 4th gen spoiler black paint with blue pearl centerline champ 500 16x8 all around potenza 245 50 16 on front and 27x11.5 16 mickey thompson sportsman pros on the rear(real sticky!!) msd 6al box blaster 3 coil accel 8.8 race wires hooker shorty headers hooker cat back system pro shift light A pillar gauge pod and water temp and air/fuel ratio gauges autometer oil pressure gauge b&m mega console shifter vette servo custom ram air system with a 9" K&N cone filter tb coolant bypass slp runners polished plenum and runners 170* thermostat smog pump and a/c delete plus cat delete march underdrive pullies, tpis airfoil cvr high torque starter (love it) aluminum drive shaft
best 1/4 mile run of 14.44@ 96.53
this run is before the new exhaust system new sticky tires coolant by pass smog removal new runners new thermostat and new three core radiator since i would get to the line and be well over 220* aluminum drive shaft and vette servo

 

You are trying to run all the amperage the fans draw through your little dash switch which is turning into the heating element on your soldering iron. You can cause a fire and melt lots of wire doing this.

You must always use a relay when wiring high draw components like cooling fans, unless you are using large gauge wire and a toggle the size of Texas.

You fan wiring should go kinda like this:

If you have the stock wiring, wire your switch to the ground wire of the relay (the little light blue or green one) so that when you turn on the switch, it grounds the circuit and activates the relay.

If you dont have the stock fan wiring in place...
- Red + wires of your fans are connected directly to the battery with fusible links.

- Black - wires of your fans go to a fan relay (each fan has it's own, and you will have to look at the relay instructions for wiring).

- Your switch in the dash is wired to the relay, and only activates the RELAY, not the fans.... The relay is there to do the hard work which is passing the current through itself to complete the ground and turn on the fans. You can also wire the relay to an aftermarket, or stock temperature switch in your heads to automatically activate the relay at the desired temp.



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Mike Metzler (Desert86Roc)[*] Webmaster: SpeedWorldMotorplex.com[*] Click Here For 86 IROC 305 TPI (406 build in progress) Page

ET's @ 1250 ft[*] 14.28 @ 95.461 mph (uncorrected, NOS, no headers)[*] 15.365 @ 86.785 mph (uncorrected, headers, no NOS)